package com.jt.sp06zuui.fb;

import com.jt.web.util.JsonResult;
import org.springframework.cloud.netflix.zuul.filters.route.FallbackProvider;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.stereotype.Component;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;

/**
 *
 * @author 郭鲁政
 */
@Component
public class    ItemFB implements FallbackProvider {
    /**
     * 返回一个service-id 表示当前降级类是针对那个后台服务的降级类
     * item-service ----指针对商品服务降级
     * *    对所有服务都执行降级
     * null  等同于 *
     * @return
     */
    @Override
    public String getRoute() {
        return "item-service";
    }

    @Override
    public ClientHttpResponse fallbackResponse(String route, Throwable cause) {
        return new ClientHttpResponse() {
            @Override
            public HttpStatus getStatusCode() throws IOException {
                return HttpStatus.INTERNAL_SERVER_ERROR;
            }

            @Override
            public int getRawStatusCode() throws IOException {
                return HttpStatus.INTERNAL_SERVER_ERROR.value();
            }

            @Override
            public String getStatusText() throws IOException {
                return HttpStatus.INTERNAL_SERVER_ERROR.getReasonPhrase();
            }

            @Override
            public void close() {

            }

            @Override
            public InputStream getBody() throws IOException {
                String error = JsonResult.err().code(500).msg("error").toString();
                return new ByteArrayInputStream(error.getBytes());

            }

            @Override
            public HttpHeaders getHeaders() {
                HttpHeaders headers = new HttpHeaders();
                headers.add("Content - Type", "application/json;charset=UTF-8");
                return headers;
            }
        };
    }
}
